Did he feel it, too, every time their shoulders bumped up against each other?

Not a knock, but something that seemed to bump up against it.

"People learn who they are by bumping up against one another," she continued.

"A good number of investors could be bumping up against that."

But then he bumped up against the side of the small cart.

We bump up against each other every now and then, but mostly things go along all right.

They bumped up against one another now and then, as characters will.

That can bump up against the time when women want to start families.

I stop in the middle of the mall, and people bump up against me.

Commercial development is starting to bump up against residential areas.